Exhaust-nozzle stand



Nov; 3, 1925. 1,560,142

T. H. CLAPHAM EXHAUST NOZZLE STAND Filed July'e, 1925 2 sheets-sheet 1 /vj Z72 .if Z3 /0 f Z V fz f Mw 42 2 .i/o 4/29 `z4 L /6 z/ k/A i f f 5 Nov. 3,1925,- Y

` T. H. CLAPHAM EXHAUST NOLZLE STAND Filed July 6, 1925 2 Sheets-Sheet 2 V Dww'n Yo@ UWM/70 O allot nop.

Patented Nev. 19.25

UNITED S THOMAS HENRY CLAPHAM, OF PITTSBURG, KANSAS.

EXHAUST-NOZZL'E STAND.

Application filed July G, 1925.

To all whom it may concern:

Be it lrnown that vl, THOMAS l-l. Charnan,

a citizen of the United States, residing at Pittsburg, in the county of Crawford and State of Kansas, have invented a new and useful Exhaust-Nozzle Stand. ot which the following is a specification.

There must be pressure in the exhaust nozzle stand of a locomotive engine, in order that the exhaust steam may pass into the stack with sutlicient velocity -to carry the products of combustion out oit the stack. It the engine is working hard, the ,pressure in the exhaust nozzle stand becomes excessive and reacts to impair the eiliciency ot the engine. The foregoing being understood, it may be stated that one object ot the invention is to provide means tor automatically relieving excessive `pressure inthe exhaust nozzle sta-nd.

The velocity with which the exhaust steam is discharged into the stack should be practically constant. Another object, then, is to provide means for relieving excessive pres-- sure in the stand without changing appreciably the velocity with which the exhaust steam is discharged into the stack.

The size of the outlet opening in the stand must be changed to suit different locomotives. The present practice is to mount different nozzles on the stand. A detachable nozzle calls i'or aI joint between the nozzle and the stand, and such a joint is likely to leak. A further object ot the invention is to 'form the outlet opening in an integral part of the stand, thereby avoiding a joint, to provide a cage for the valve by which excessive pressure in the stand is relieved, to mount the cage in the opening, and to substitute for one cage, a cage of a diiterent diameter, when the area of the outlet opening must be changed.

lVhen a. locomotive engine is drifting, there is no exhaust discharge through the nozzle stand, and cinders and carbon tend to lind their way into the stand, into the cylinders of the engine, and elsewhere. Another object is to provide an auxiliary supply of steam to the stand, thereby to eject the products of combustion from the stack, when the engine is drifting.

Another object of the invention is so to construct the stand that it will iill the stack with exhaust steam at a point low down on the stack, this being done by Jforming a CIO Serial No. 41,904.

relatively large opening in the top of the stand, and partially tillingthe opening the valve cage, hereinbefore mentioned, the opening thus beingl given an annular form,

'of large diameter, and it `being unnecessary 'within the scope of what 4is claimed, without departing from the spirit of the invention.

In the accon'ipanying drawings z- Figure `1 shows in longitudinal section, a device constructed in accordance with the invention; Figure 2 is a section on the line 2--2 ot' Figure 1, the valve having been shifted from the position oit Figure 1, in order that certain ports may be shown in registration; Figure 3 is a cross section on the line 8 3' of Figure 1; Figure 4 is a longitudinal section taken in a plane at right anglesv to the cutting plane in Figure 1, parts being'brolzen away.

The stand comprises a base 1 carrying a tubular body 2. A web 3v joins the base 1 with the body 2. A tapered partition 4 eX- tends across the `body 2 at the lower end thereof and is joined atits ends to the body. Therpartition 4 has a broadened bottom 5 in which is formed a longitudinal passage 6 communicating with an inlet 7 Jashioned in the web 3. There are upwardly and laterally inclined discharge ports 8 in the bottom 5 off the partition 4. A support or bridgev 9 extends across the body 2 and is joined at its ends to the body, the support comprising a hub 19. At its upper end, the body 2 has an inwardly extended flange 10 provided with an outlet opening 11.

A cup-shaped cage 12 is located in the body 2 and extends into the opening 11.

The cage 12 has a stem 14 mounted detachably in the hub 19 of the bridge 9. A securing device 15, such as a bolt, passes downwardly through the bottom ot the cage 12 and through the stem 14. A nut 16 is threaded on the securing device and engages the bottom of the cage 12. There is a washer 17 on the securing` device 15, the washer engaging the lower surface or' the hub 19 o't the bridge 9. A nut 18 is threaded on 'the securing device 15 and cooperates with the washer 17. rIhe construction, obviously, is such that the cage 12 is mounted det-achably in the support or bridge 9. The cage 12 is provided with an internal seat 2() and has side inlet ports 21 located below the seat 2l). Near to itsl upper end, and below the itlange 10 of the body 2, the cage 12 is provided with side discharge ports 22.

A cup-shaped valve 23 is mounted to slide in the cage 12 and on the securing device 1'5, the securing device serving, to some 'extent, as a guide for the valve. On its bottom, the valve 23.is supplied with a hub 24 engaging the lower end of a compression spring 25 disposed about the securing` device 15. The upper end oi the compression spring 25 cooperates with an abutment made up or a disk 26 on the securing device 15, and a nut 27 on the securing device, the nut retaining the disk. The parts 15, 2G and 27 act as a retainer for the spring 25. The valve 28 has discharge ports 28 which are out of registration with the discharge ports 22 of the cage 12, when the valve 23 engages the seat 2O under the action of the spring 25. Under ordinary conditions, the exhaust i' steam, proceeding through the vbody 2, is

discharged through the opening 11. It, however, an excessive pressure builds up in the body 2, the pressure is communicated, through the inlet ports 21 of the cage 12, to the bottom of the valve 23, within the cage 12, and the valve 23 moves upwardly, the spring 25 being compressed, and the discharge ports 28 of the valve coming into registation with the discharge ports 22 of the cage 12. .Them the excessive pressure is relieved through the ports 22 and 28,

and upwardly and outwardly through the cup-shaped valve 23. lhen the excessive pressure has been relieved, the valve 23 seats under the action of the spring 25, and the ports 28 and 22 no longer are in registration. rIhe operation last above described carries out one of the objects of the invention, in that, through it, the excessive pressureY in the stand is relieved.

Because the excessive pressure is relieved through the ports 22 and 28, when they are in registration, and through the top of the cup-shaped valve 23, the discharge through the opening 11, and the velocity with which the exhaust proceeds through the stack, are not affected appreciably, and, thus, another object of the Vinvention is consummated. l f

When it is desired to change the effective area ot the outlet opening 11, this may be done by substituting for the cage 12, another cage of a diiterent diameter, and since the opening 11 is formed directly in the flange 10 ot the bod)v a leaky joint cannot result, as is the case when one detachable nozzle is substituted for another detachable nozzle.

A governed supply of .aturated steani may be carried from the top oit the boiler to the inlet 7, by any suitable means (noi shown). The steam thus supplied proceeds through the inlet i", the passage 6 and the ports 8, and moves upwardly on opposite sides of the tapered partition t. Owing to the construction and operation last-above referred to, cinders and carbon will be carried out of the stack, and will be prevented from dropping and accumulating, even through the propelling supply or steam is cut off and the engine is drifting.

Owing to the fact that the. opening 11 is of considerable size, and because it assumes an annular form, since the cage 12 projects into the opening, the stack will be filled completely with exhaust, at a point low down on the stack. f f

In order that the ports 28 and 22 may remain in full registration when rthe valve 28 moves upwardly to thelimit, the cage 12 carries an inwardly projecting stop, such as a screw 30, the inner end of the screw being received in an elongated slot 29 fashioned in the side of the valve 28. The i parts 29 and 30, furthermore, prevent the valve -J3 from rotating, wear being reduced accordingly. y

I-Iaving thnsdescribed the invention, what is claimed is j v1. In a device ofthe classdescribed, a stand having an outlet, and valve-controlled means for relievingexcessive pressure Withvin the stand, independently ot the outlet,

said means extending into the outlet, to give the outlet an annular form.

2. In a device ofthe class described, a stand having an outlet, a cage projecting into the outlet, means for mounting the cage detachably on the stand, a valve slidable in the cage, the valve and the cage having discharge ports which cooperate to relieve pressure in the stand, when the valve is advanced by pressure, and the cage being so constructed as to admit pressure on the valve.

3. In a device of the class described, a stand having an outlet, a cage in the stand, a valve slidable in the cage, the cage and the valve havingdischarge ports which cooperate to relieve pressure in the Stand, through the valve, when the valve is advanced by pressure, andthe cage being so constructed as to admit pressure on the valve,

e. yIn a device of the class described, a stand having an outlet, a cage in the stand,

a valve slidable in the cage, the valve and the cage. having discharge ports which ccoperate te relieve pressure in the stand when the valve is advanced by pressure, the cage being so constructed as to admit pressure on the valve, a securing device connecting the cage with the stand, -and spring means for operating the valve to dispose said ports out of registration, the spring means being retained by the securing device.

5. In a device or' the class described, a stand having an outlet, a valve-controlled means for relieving excessive pressure Within the stand', independently, of the outlet,

and mechanism for discharging an auxiliary supply of steam into the stand.

6. A device of the class described, constructed as set forth in claim 5, and further characterized by the fact that said mechanism embodies a partition located in the stand and provided With a passage, the partition being supplied with ports communicating with the passage and diseharging on opposite sides of the partition.

In testimony that I claim the foregoing as my own, I have hereto aiXed my signature.

THOMAS HENRY GLAPI-IAM. 

